Metal

As has long been the story at One Infinite Loop, what Apple giveth is what Apple taketh, and Apple’s latest rendition of OSes is going to be no exception. Listed in the developer release notes for both iOS and macOS, Apple is deprecating support for what are now their legacy graphics and compute APIs: OpenGL, OpenGL ES, and OpenCL. Instead, Apple is strongly encouraging developers to use their proprietary Metal API, which has been available for a few years now.
Apple’s lack of interest in Khronos’s Open APIs has not gone unnoticed over the years. Apple never added support for OpenGL ES 3.1 or later on iOS, and similarly macOS doesn’t go beyond OpenGL 4.1 (Khronos is up to 4.6 now). Instead, Apple has been...